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Most commonly, the horizon is the border between the surface of a celestial body and its sky when viewed from the perspective of an observer on or above the surface of the celestial body. This concept is further refined as:
Perspective, Refracted horizon & Overview
Explore the main themes, entities and connections around Horizon. Start with the topic map, then use the sections below for research and deeper semantic analysis.
Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.
High-confidence facts extracted from structured source data. Use them as anchors for further research.
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Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
observer distance refraction earth metres sea line surface atmospheric true plane kilometres level radius see mi height refracted away ft
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Horizon | is a | border between the surface of a celestial body and its sky when viewed from the perspective of an observer on or above the surface of the celestial body | 0.90 | text |
| Horizon | is a | closest an observer can get to seeing the true horizon.The refracted or apparent horizon | 0.90 | text |
| Horizon | is a | horizontal plane through the eyes of the observer | 0.90 | text |
| Horizon | is a | key feature of the picture plane in the science of graphical perspective | 0.90 | text |
| buildings.There is also an imaginary astronomical | instance of | by life forms such as trees and/or human constructs | 0.80 | text |
| celestial | instance of | by life forms such as trees and/or human constructs | 0.80 | text |
| or theoretical horizon | instance of | by life forms such as trees and/or human constructs | 0.80 | text |
| part of the horizontal coordinate system | instance of | by life forms such as trees and/or human constructs | 0.80 | text |
| which is an infinite eye-level plane perpendicular to a line that runs | instance of | by life forms such as trees and/or human constructs | 0.80 | text |
| an ellipse | instance of | not even a plane curve | 0.80 | text |
| especially when the observer is above the equator | instance of | not even a plane curve | 0.80 | text |
| as the Earth's surface can be better modeled as an oblate ellipsoid than as a sphere.Distance to the horizonFormulaThe distance to the true | instance of | not even a plane curve | 0.80 | text |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.